<?php

/**
 * LoginForm class.
 * LoginForm is the data structure for keeping
 * user login form data. It is used by the 'login' action of 'SiteController'.
 */
class LoginForm extends CFormModel
{
	public $user_name;
	public $user_password;
	public $user_remember;

	private $_identity;

	/**
	 * Declares the validation rules.
	 * The rules state that username and password are required,
	 * and password needs to be authenticated.
	 */
    public function rules()
    {
        return array(
            array('user_name', 'length', 'min' => 2, 'max' => 16, 'allowEmpty' => false,),
            array('user_password', 'length', 'min' => 6, 'max' => 16, 'allowEmpty' => false,),
            array('user_remember', 'boolean', 'message' => 'Remember format error.'),
            array('user_password', 'authenticate')
        );
    }

	/**
	 * Authenticates the password.
	 * This is the 'authenticate' validator as declared in rules().
	 */
	public function authenticate($attribute,$params)
	{
		if(!$this->hasErrors())
		{
			$this->_identity=new UserIdentity($this->user_name,$this->user_password);
			if(!$this->_identity->authenticate())
				$this->addError('user_password','Incorrect username or password.');
		}
	}

	/**
	 * Logs in the user using the given username and password in the model.
	 * @return boolean whether login is successful
	 */
	public function login()
	{
		if($this->_identity===null)
		{
			$this->_identity=new UserIdentity($this->user_name,$this->user_password);
			$this->_identity->authenticate();
		}
		if($this->_identity->errorCode===UserIdentity::ERROR_NONE)
		{
			$duration=$this->user_remember ? 3600*24*30 : 0; // 30 days
			Yii::app()->user->login($this->_identity,$duration);
			return true;
		}
		else
			return false;
	}
}
